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Finding the Fourth Proportional to 1,218.68, 1,827.64 and 396.77

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Solution

The fourth proportional to 1,218.68, 1,827.64 and 396.77 is: 595.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.68 : 1,827.64 = 396.77 : x
  2. Step 2: Convert to fraction form
    1,218.68/1,827.64 = 396.77/x
  3. Step 3: Cross multiply
    1,218.68x = 1,827.64 × 396.77
  4. Step 4: Simplify right side
    1,218.68x = 725,141.60
  5. Step 5: Solve for x
    x = 725,141.60/1,218.68
  6. Step 6: Final answer
    x = 595.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.